Sprinkler



FIG. 1 is a top plan view of a sprinkler showing my new design;

FIG. 2 is a right side elevation thereof;

FIG. 3 is a rear elevation thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a left side elevation thereof; and

FIG. 6 i a front elevation thereof. 

The ornamental design for a sprinkler, substantially as shown and described. 